OBJECTIVE: To analyse the relation between antioxidant vitamins A, E, and malondialdehyde (MDA) lipoperoxidation product plasma concentrations with incident dementia. DESIGN: : A nested case-control within the PAQUID (Personnes Agées QUID) cohort. SETTING: The PAQUID population-based prospective cohort in southwestern France. SUBJECTS: Among 626 subjects with blood collection at baseline, 46 developed a dementia during the follow-up and were considered to be cases...